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The aim of this research is to examine the readiness of science teacher candidates on electrical conductivity of acid, base and salt solutions. 25 teacher candidates studying at third grade at the Department of Science Education have participated in the research. The study was conducted using the survey model. Teacher candidates were asked to express the name and kind of chemical substance and the electrical conductivity of the aqueous solution. Data obtained from the study were analyzed using descriptive analysis. As a result of the research, it was determined that most of the candidate teachers named the chemical compounds correctly. All teacher candidates gave the correct answer for the type of chemical substances. But one teacher candidate expressed that magnesium nitrate is an acid. It was determined that a small number of teacher candidates thought that acids and bases did not transmit electrical current. A significant part of teacher candidates thought that aqueous solutions of salts did not transmit electrical current. [ABSTRACT FROM AUTHOR]